I love this lens. After having trouble selecting between the 24-70 or the 24-105, I chose the 24-105 just for the IS. Suits my type of shooting. Places like museums, churches that do not allow flash IS is perfect. Not even a 2.8 is fast enough for some of these lighting situations. Plus this lens is light, so traveling with it is great. This with the 10-22 is a perfect combo for me...